If you need a magnetometer, then buy a board with one, there countless varieties.The people that buy the KK2 board don't need a magnetometer, just like they don't need a GPS, or they would have bought a board with one in the first place.

Me and my friend was putting two 450mm quads togeather with KK2 and Simonk ESCs.
We both have RCExplorer Tricopters with KK2s and they fly fantastic with Plush ESCs.
First thing I did was to flash both our bords to V1.2
My bord was stock 1.0 and my friends was already 1.1
Assembly, balansing,calibration etc. Time to fly!

I was however confused with the quad as I could not increase the P gain higher than 30 befure I got bad ocilations. My friend with a identical build could easy go above 150...

Time for some head scratching... Rebalance the props, remount the board, check all settings but no differance.

So finaly I decided to reflash (LazyZero) the board. And just like that the quad fly absolutly FANTASTIC!

I do not understand why this helped but it did.
Maybe this will help someone else.

Me and my friend was putting two 450mm quads togeather with KK2 and Simonk ESCs.
We both have RCExplorer Tricopters with KK2s and they fly fantastic with Plush ESCs.
First thing I did was to flash both our bords to V1.2My bord was stock 1.0 and my friends was already 1.1
Assembly, balansing,calibration etc. Time to fly!

I was however confused with the quad as I could not increase the P gain higher than 30 befure I got bad ocilations. My friend with a identical build could easy go above 150...

Time for some head scratching... Rebalance the props, remount the board, check all settings but no differance.

So finaly I decided to reflash (LazyZero) the board. And just like that the quad fly absolutly FANTASTIC!

I do not understand why this helped but it did.
Maybe this will help someone else.

Thanks for all your fantastic work, KK, LazyZero, SimonK!

The main improvement from 1.0 to 1.1 is the servo handling ... and 1.0 was already reported to don't work very well on a tri-copter.

1.2 it is only a bug fix of 1.1 about the calibration procedure ... so nothing added about stability functionality.

Hi Chris
Just changed the I gain on the yaw, didn't make any difference, unfortunately I don't have another board, might buy another one and see how that goes, in the mean time might reflash the firm ware and see what happens.

Thank you very much for your time, if I ever work out the problem I will post it up.
Thanks
Fordy

I guess nobody care to have a stable quad in ground effect situation ...

I do care. This is always also part of my tests.
If the quad is stable in ground proximity it won't do sudden strange things in the air during hard maneuvers.
This is also a good point to check whether one has vibration problems.
If the quad oscillates just above the ground but it flies smooth 1m higher there is still too much vibration reaching the FC.

I do care. This is always also part of my tests.
If the quad is stable in ground proximity it won't do sudden strange things in the air during hard maneuvers.
This is also a good point to check whether one has vibration problems.
If the quad oscillates just above the ground but it flies smooth 1m higher there is still too much vibration reaching the FC.

Ok ... good points ... a bit in the direction of be ultra perfectionist ... but ... yes good points.

The airflow in some quad could have a mayor alteration in the ground effect ... it depends how "tall" are mounted the propellers ...

I have a old HK V1 framework, the one made of wood, designed with camera mount ... and this has almost no ground effect ...

I do care. This is always also part of my tests.
If the quad is stable in ground proximity it won't do sudden strange things in the air during hard maneuvers.
This is also a good point to check whether one has vibration problems.
If the quad oscillates just above the ground but it flies smooth 1m higher there is still too much vibration reaching the FC.

But besides the escs, it depends on the frame, the props, how "tall" are they mounted and the PID settings, even the battery mount position.
I am having almost no GE, similarly to e_lm_70 but with this frame, and I tell you it was not easy to set it up, I have made a lot of tests.
As you know the Q450 has quite a long bottom plate and it does not really help fighting the turbulences.

But besides the escs, it depends on the frame, the props, how "tall" are they mounted and the PID settings, even the battery mount position.
I am having almost no GE, similarly to e_lm_70 but with this frame, and I tell you it was not easy to set it up, I have made a lot of tests.
As you know the Q450 has quite a long bottom plate and it does not really help fighting the turbulences.

Im on the brink of ditching these RCTimer 2820/14 motors together with the adapters and props. Seems to me i can't find adapters machined well enough to reduce the vibration. Even the adapters that are screwed directly to the motor bell are too tall multiplying vibrations. Are there any cheaper motors than DJI with similar mounting mechanism? The ones that have propellers close to the motor itself?